제출 #389046

#제출 시각아이디문제언어결과실행 시간메모리
389046faresbasbs선물상자 (IOI15_boxes)C++14
100 / 100
540 ms202168 KiB
#include <bits/stdc++.h> #include "boxes.h" using namespace std; long long n,k,l,num,in[10000001],dp1[10000001],dp2[10000001]; long long delivery(int N , int K , int L , int p[]){ n = N , k = K , l = L; num = l/2; long long ans = 1000000000000000000 , v1 = 0 , v2 = 0; for(long long i = 1 ; i <= n ; i += 1){ in[i] = p[i-1]; if(in[i] <= num){ if(i >= k){ dp1[i] = dp1[i-k]; } dp1[i] += 2*in[i]; v1 = dp1[i]; } } for(long long i = n ; i >= 1 ; i -= 1){ if(in[i] <= num){ break; } if(i+k <= n){ dp2[i] = dp2[i+k]; } dp2[i] += 2*(l-in[i]); v2 = dp2[i]; } ans = v1+v2; if(k >= n){ ans = min(ans,l); } for(long long i = 1 ; i+k-1 <= n ; i += 1){ if(in[i] <= num && in[i+k-1] > num){ ans = min(ans,dp1[i-1]+l+dp2[i+k]); } } return ans; }
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